Giraldo Castle, or Geraldo Castle, is located in Nossa Senhora de Guadalupe, in the current parish of Nossa Senhora da Tourega and Nossa Senhora de Guadalupe, in the Municipality of Évora, District of Évora, in Portugal.
It is a castro, a proto-historic fortified structure with origins in the Bronze Age or even the Chalcolithic, but with traces of later occupations.
It has a subcircular plan and an outer perimeter of 114 meters. The wall that has survived to the present day probably belonged to a period of medieval occupation.
Sources from the 15th century refer to the fortification, associating it with the presence of Geraldo Sem Pavor, a warrior who conquered Évora from the Muslims in 1165.
It is currently in the process of being classified.